Influence of tungro virus-infected rice plants on the behavior and biology of the green leafhopper Nephotettix virescens and its role in tungro epidemics
1984
Khan, Z.R. | Saxena, R.C. (International Rice Research Inst., Los Banos, Laguna (Philippines). Dept. of Entomology)
In a choice test, tungro-infected plants attracted significantly more Nephotettix virescens (Distant) individuals than did the healthy plants, but after 24 hours and later, more individuals were found to be settled on healthy plants. Insect feeding on diseased plants was disrupted and the quantity of food ingested and assimilated was significantly less than on healthy plants. Although there was no significant difference in the number of nymphs becoming adults on infected and healthy plants, the growth period was prolonged on diseased plants. A significaant reduction in adult longevity, fecundity, egg hatchability, and population growth was observed on tungro-infected plants, but ovipositional response was not adversely affected. Biochemical analysis of tungro-infected plants showed an increase in the content of free sugars but a decrease in soluble proteins as compared to that in healthy plants. Thus, observed deleterious effects of tungro-infected plants on N. virescens biology could be attributed to changes in plant food quality
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